If a monitor is running faster than 60Hz it interferes with the walking animation and the movement becomes jerky and very slow. There is no way to set refresh ingame so I turned it down to 60hz in Nvidia control panel and that fixed it. 

Ah, sorry to hear you had a problem but glad to hear you were able to resolve it. I know I had some issues with the animation behaving irregularly based on frame rate in the past but I thought I had it sorted. Thanks for this info!